Where does “豚脂” come from?

豚脂 (Japanese) comes from Japanese 豚, from Chinese 豚 — suckling pig.

Ancestry of “豚脂”, step by step

豚脂 traces back through two separate lines of ancestry.

via Japanese

StepLanguageWordMeaning
1Japanesepig; swine
2Chinesesuckling pig

via Japanese

StepLanguageWordMeaning
1Japaneseresin; fat
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豚脂 — Etymology, Origin & Word History | Etymology Explorer